At 1423 you are on course 072 T° at 12.2 knots, when you sight a rock awash bearing 070°T at a range of 3.6 miles. If you change course at 1427, what course would you steer to leave the rock 1.0 mile abeam to port?

Correct Answer: Option C — 091°

Using time, speed, and distance principles, calculate the vessel position at course change time (1427), determine the relative bearing and distance to the hazard, and plot the intercept triangle required to leave the rock 1.0 mile abeam to port on course 091°.